He was announced at TFCon 2012 and will see release after their Hexatron. Here are the release images:
The pictures aren't all that detailed, so thanks to Bountyan @ TFW who enhanced them
Finally just recently we were given the approximate scale of the figures from CenoKibble @ TFW, who is a member of MMC.
The figures are all around Voyager size, except Razorclaw who is larger to form a big torso. It was a fine balancing act all round, as the animation model and logic behind a combiner dictates that not-Razorclaw has to be substantially bigger than the others, but then that throws out his alt. mode, which on the original toys is in scale without the others. I can say this took a LOT of work to get a good compromise.
Final scale on combined Ferocicus is about the same height as Hercules.
Sixth member is not what people think, but is a lot of fun, giving way to an optional, more balanced transformation.
And more details about pricing and dimensions:
Gestalt is 32cm tall from feet to head, excluding shoulders, backpack cannons etc...
All 5 figures will all be discounted 15%-20% for pre-orders
Pricing is based on the pack–in content and design of the figures: e.g. the leg members will have more parts, and Razorclaw is bigger.
All hail the king!